Ask HN: Software for helping visually impaired persons?

My dad is slowly going blind due to macular degeneration (basically the nervcells in the retina slowly dies, starting in the macular region). He still has ok vision but starts to have real issues reading longer texts, long term he will go completely blind.

I'm now looking for software (preferably open source) that can help him when using the computer. Main use case is being able to retrieve larger quantities of information (e.g. emails, news articles, etc) either by magnifying some part of the screen or by reading out the text loud.

Current solution is using a large "analog" magnifying glas in front of the screen, feels like there should exist a better solution. Long term it would be preferable if the solution can also assist him with navigating the web using audio.

Did some googling but mostly ended up on pages with more generic tips on how to adjust ambient lighting in the room etc. Any tips on where to look?

Grateful for the help!